Heat a frying pan over medium heat and add mustard oil. When the oil gets heated and you start to see smoke add the fenugreek seeds. Wait till it goes dark brown and add chilli flakes, turmeric powder and take off from the heat straight away.

Pour this into the bowl with the potatoes.

Mix it well and it is ready to be served.

It tastes best if you leave the Aloo ko achar in the fridge for half an hour before serving.